.reveal {
  opacity: 0;
  transform: translateY(40px); /* começa embaixo */
  transition: opacity 0.4s ease, transform 0.4s ease;
  will-change: transform, opacity;
}

/* ENTRADA */
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* SAÍDA → SOBE */
.reveal.is-exiting {
  opacity: 0;
  transform: translateY(-40px);
}

.reveal.delay-1 { transition-delay: 0.5s; }
.reveal.delay-2 { transition-delay: 0.6s; }